Printing press



Aug. 28, 1923.

C. -A KELLOGG PRIRTING PRESS ?atented Aug. 28, 1923. I

UNITED STATES intense PATENT GREECE.

CARL A. KELLOGG, or BROOKLYN, new YORK.

IP RINTING PRESS.

Application filed Marches, 1919. Serial m. 285,339.

T 0 all whom it may concern:

Be it knownthat I, CARL A. KELLOGG, a Citizen of the United States, residing inthe city offNew York, borough of Brooklyn,

county of Kings, and State ofNew York,

have invented certain new and. useful Improvements 1n PIIII LIIIg PIGSSGS, of wh ch the following isa specification.

This invention relates to printing presses, and among the Ob]@Ci3S of the lnvention,

the ready positioning of the form within or its removal from the bed; the provision ofa machine having a prlntingcouple, one

-. or both of the members of which are movable toward and away from one another, and with which moving member or members is associated cushioning means, preferably operating through leverage connections, for the purposecof taking up the shock between the members of the printing couple when they are brought together intovprinting cooperation and, for 'counterbalan'clng themovable member; and, the provision, in a prlnting machine of the character described, of means for taking up lost motion and wear in the operating parts'o f the movable printing couple member or members.

Features of the-invention other than thosespe'cified will be apparent-fromthe hereinafter detailed description taken in COIlJLlIlC- tion with the accompanying drawlngs.

In the accompanying drawings I have" illustrated one practicalembodiment of the invention,v but the construction therein shown is itobeunderstood as illustrative only, and not as defining the limits of the invention g y g g Figure 1 is a side'elevationvof a portion of a printing p'ress showing the present invention as associated therewith, the operating membersofthe printing couple being shown inthis figure on 1mpression;1and- FigureQ is a view similarv to Figure-1, but illustrating the parts in the positions which they assume when off impression, I

Referring tothe drawings, A designates upright 7 side portions of the frameof printing machine, which, in the form of the invention. shown,- has mountcd therein-a fixed form bed B, and a movable platen C.

The platen is of a rocking-typeof'the general character disclosedin thependingapplication' of John Caplinger, Serial i 1 254,162, and, as in the prior application, is movable toward and away from the fixed form bed and is adapted to'be rocked while on impression by virtue; of'its" operating member which is in'the form of a crank shaft D, of which dis the shaft, and dfthe.

crank. The shaft (Z is mounted for rotation between upper and lower j-ournals E and E which'are mounted for vertical adjustment in slides flformed in'the frame A. Correct vertical adjustment may be had in the journals through the manipulation of adj u'sting screws 6 ande' which jthread into the frame and have theirjheads bearing against the opposed journal'fboxes E and E? respectively. {Throughthe manipulation of the adjusting, screws c and, e, the crank shaft may be raised o-r lowere dior the purpose of obta n ng proper cooperation between the curved impression surface 0 of the platen and ajform adaptedto be supported'by the; form bed B, Moreover, associated with the lowerjjournal E are a pair of compression" springs g, the purpose of which is to take up any lost motion due to wearbetween the journal bearing andthe crank shaft. If

there is any looseness in the bearings the p latenwill pound whenlt comes nto'conta'ct.

with the bearers, if such are used, or with the type" whereino bearersare employed: "The springs take the weight of the platen and are sufficiently strong to hold thebearing E in,

engagement with'the shaft so that all lost motion is taken up and, asthe boxes E and E do not meet, the'springs g will have a directp'ressure or lifting effect on the shaft- The platen is guided for operation by cross heads H-,"positioned' at either side of the platen, and pivotally secured thereto at Sideopenings are provided in the up right portions at the oppositesides' of the platen, and the Vertical edgesc of'the openings serve as guides, forthe opposite ends f the s -h s; f; Thus; through the; 1 p r n-7 he -lc'ros's-heads with ftheir guides, the platen is guided fou vertical movement when it is operated upon by the crank shaft'l), It will thus bejseen that the platen .is'pivotally supported by.the c:ank

shaft D at a point'eccentric'to its'curved impression surface 0, which latter is struck with a comparatively large radius greatly exceeding the distance of the axis of thecrank cl from the impression surface 0, so that a comparatively slight extent of engalar or rotary movement of the crank shaft, will suffice to move saidplaten'toan'extent sullicient to cause the platen to completely traverse the form to complete the impres= sion.

The advantages of guiding: the platen by cr'oss heads as described, is that when the platen'if off" impression free access maybe had-to the formjbe'd fromthe side of'the machine, sothat'the'for-m'may be readily p'osi}: tio 'ifedin or removed therefrom; The advanta e of this will be apparent to those skilled in theart" and i the present" invembicnthus overcomes a disadvantage in the press of the co-pending' Caplinger application hereinbefore referred to, whereintho. guides for theplatenare at the sideofthe' form'bed and'p'reclude the positioning-jot a forni into the machine from the side thereof;

Whenthe parts become worn in plateii' presses of'the character described, there is" more or' less shock when the member'spf' the printing couple come together for iin pression' due-mainly to lost IIlOlJlOTlvlOllb 1n the. accompanying drawlngs, I have diagrammatically shown means wherebythis work arms and to the cross-heads He may be obviated. The means in question consistsof' a pair of'bell cranks having work arins z and-power arms-2 Thesebell cra nks' are fulcrumed at i and have link connections 2' pivotally secure'd'tothe endsiof their soc-iatedwith the power arms ofthe bell of'tlie-couple toconie' into Contact at-high cranks are springs I, through which extend guide rods I and the compression on these springs may be varied by adjusting nuts 2' threaded on the arms. The compression on the springs I is sufiicient'ly great-to take'the weight of the platen and cross-heads, and to serve toslightly hold back the platen as it is forced down-by the crankshaft; Thus, as the platen goes'down on impression, the tension on the springs'l is increased until, at the time the platen goes on" impression it: is'checked sufliciently to overcome its r110 nientjum,thereby allowing of the members speeds without shock. v

l 'It'willbe noted'that in the-sliOWinQ-nmdQ: the work" arms} of the bell cranks are of greater lenglhthan the power' arms, and

this construction allows of relatively eXten-' sive movement 'of -the' platen with propor tionatelylittle ino'vem'ent' of the springs, TheTSpring's are thuslenablefdto better main stain their adjustment and will last muchlongerthan if"theyfwere directly subjectedto 'great'injovement from the platen, 7 "'It' will be apparent from the" foregoing description that the present invention embodies manyfeatures of advantage-over the heads which allow theplatento be' rocked over the fornibed whileguided by the-"crossheads, and, if" desired, the; sliding'fconnec tion'between the cross-heads and the frame" of the inachineinaybe made adjustable totake up wear. \Vhile the springs I"a re" shown-as connected to the 'cross-heads through bell cranks and links, theyim'aybe' directly connected to the'platen without de- -partijng from-the spiritof this invention,

Y I am aware, that weights. for; counters balancing platens have been employed, but in every in'stance these we ghts do'notpre -e vent shock and 3' ar when the platen contacts" with the form, the function'of such weights being nierelyto balance the weight of the platen as it is tilted back" to allow of the placement of the sheet to-be' printed and do' not serve to lift the-platen. a

I am also'aware that springs haveibeen used to take'up thewe'ight ofa lifting cylin-lt deravhi ch pr-ints on but one'of a, number of} its revolutions but, such cylinders lift but verylittle, and the construction is such'thatoftim'e if cylinder isra isejd high enough to allow of' a form roller'to pass 'betweenthe' cylinder and the bed' as isnecessary' in a platen press. 7

in the manner specified,,it'i's perfectly'fe'asi-i 'ble to dispense witli the springs and'usean' air cushion instead; i. e., to control theop- QIHUOIL of the bell-cranks through pneu Ina-tic means, and, in practice; either a springer pneumatic means can be employed. I

While v'tl is preferred to employ springs I" the springs will not stand up for any length n The foregoingdescription, andintheac companying drawings, the invention is described as enibodying both the spring. connection with the crank shaft and thefspri ng and bell cranks as connections with the platen; When'both these features aree'mployed together, a high "efiiciency press re sults,tbut, if desired, either one ofthe'se fea tures may be employed without necessarilyv embodying the'other'. Moreoven'while it'is preferable to support the platen at both ends thereof, a very satisfactory structure re sults'if the spring cushionin'g means is associated with only the leading 'endof the platen, i. e., the end which first engages with the form on impression, since, after the platen is once on impression, the mere rockin thereof will not cause jar or shock.

.. laving thus fully described the invention;

what I claim as new, and desire to secure by Letters Patent'is:

1. A printing press embodying a printing couple, means'for moving one member of the couple toward and away-from theother to allow a form roller to pass over-one of said members and to bring-"said members on andthe platen is pivoted, and means for operat ing the platen to move it toward and away from the form bed androck it over the form bed while on impression, said cross-head, when the platen is oif impression, allowing the positioning ofa form onto the form bed from the side of the machine and beneath the cross-head, and means for countel-balancing the weight of the cross-head and platen.

4. A printing press embodying a form bed and a platen, a slidable cross-head to which the platen is pivoted, and means for operating the platen to move it toward and away from theform bed and rock it over the form bed while on impression, said crosshead, when the platen is ofi impression, allowing the positioning of a form onto the form bed from the side of the machine and beneath the cross-head,.and cushioned leverage connections for counterbalancing the weight of the cross-head and platen, and for precluding shock when the platen goes off impression. Y

5. In a printing machine a printing couple, operating means for moving one mem- 'ber'of the printing couple toward and away from the other to move the movable member on and off impression and to positively limit the movement of the movable member independently of contact-between said members, and means for the automatic taking up of lost motion in the operating means to prevent shock when the members go on impression. V

6. A printing press embodying a printing couple, one member of which is movable toward and away from the other, to allow of the passage of a form roller between said members in. combination with means to prevent shock embodying at least one lever pivoted to one of said members, and aspring associated withsaid leverfor. preventing shock when the: members are brought to:- g-ether l I i,

7. A printing press embodying a: printing couple, onemember of which. .is movable toward and away from the other,'a shaft and bearings for automatically operating the movable memberand resilient meansfor automatically taking up lost motion between theshai't andbearings, in combination with means for counterbalancing the movable member. a

' .-8'.'A printing press embody ng a platen,

means for bodily raising and lowering the platen to move it off and on impression and for rocking the platen while on impression, and means for counterbalancing'the platen at all times j 9. A printing press embodying a platen and cushioned levers for counterbalancing the platen and'to take the shock of the platen when going on impression.

10. A printing. press embodying a platen,

bell crank levers, the long arms of which are operatively connected with the platen,

and cushioned means associated with short arms for ,counterbalancing the weight of the platen. I

lLA' printing press embodying a printing couple mounted for relative movement,

and cushioned leverage means for preventing shock or ar between the members of the couple when going on impression. U

12. In a printing machine, a printing couple embodying a movablewmembe'r provided with a trunnion, sectional bearings embracing the trunnion and means for automatically taking uprthe lost motion in bearing and trunnion.

13. In a printing machine, a printing.

couple embodying a movable member provided with a trunnion, sectional bearings embracing the trunnion and means for automatically taking up the lost motion inbearing and" trunnion, in conjunction with means independent of the said automatic means and the journa'l'for supporting the weight of the movable member.

14.111 a printing machine, a printing couple embodying a movable member provided with a trunnion, sectional bearings embracing'the trunnion and means for automatically taking up the lost motion in bearing and trunnion, a plurality of levers pivoted to the movable member and springs 7 associated with said levers for impelling the levers in a direction to counter balance the weight of the movable member and assist said automatic means in taking up lost motion. v 1 v 15. In a printing machine, a printing coupleembodying a movable member pro- ,tomatically: taking up eratin vicled with a 'trunniony s'eot-ional bearingsembracing the; trunnion and-' means: for: an-

bearing' and trunnion,

spring-associated with the other; arrnvofi ea-Izh lever-for counter balancing the Weight of; the movable-member and 1 also EISSlStlDg saidmeans vin takinguplost motion; 7

'16. In printlng; mach1ne,x a platen opaeratingsmeans for unylelclably forcing: the: platen on impression, and means for auto matically ta kinglnp lostImotion inthe'op means. V n; a-- printing machine; printing coupler embodying movable member, op

erating means for unyieldably fbrcingtb' movable member on impression, and means for automatic-ally taking; up lost: motion in theoperatingzmeansi v 18. A printing.presswembodying: a: formbe'd and: a platen', aslidable crosshead' to which: the platen is pivoted,- and means for operating the platen t0-1noveit towar'dandf away from'the form bed androck it over the: form CIOSShGELd, When'the platen is ofi? impression,

allowing the form to be readilypositioned- 1011501 removed-from-thebed. 1

have signed-my V In testimony whereof, I name tothis specification.

bed while onv impression, said.

CARLA. KELLOGG. 7 

